(Metrics) Implement "createMeasure"

[mayurkale22]

Implementation of createMeasure in the Metrics SDK is not done.

Part of [#402]
Follows [#437]

opentelemetry-js/packages/opentelemetry-metrics/src/Meter.ts

Lines 46 to 52 in 2848296

	createMeasure(
	name: string,
	options?: types.MetricOptions
	): Metric<MeasureHandle> {
	// @todo: implement this method
	throw new Error('not implemented yet');
	}

API Specs: https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/api-metrics.md#measure

[markwolff]

I can take this one if it is still up-for-grabs